Dangerous Heat and Possible Flooding

Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

Lat: 38.2075°NLon: 122.27944°WElev: 33.0ft.

Clear

61°F

16°C

Humidity 77%
Wind Speed WSW 3 MPH
Barometer 29.92 in (1013.21 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 28 Aug 05:00 AM PDT
Extended Forecast for

3 Miles SE Lake Berryessa CA

  • Overnight

    Overnight: A 20 percent chance of showers.  Mostly cloudy, with a steady temperature around 68. Light southwest wind.

    Low: 68 °F

    Slight Chance
    Showers

  • Friday

    Friday: A 20 percent chance of showers before 11am.  Mostly cloudy, then gradually becoming sunny, with a high near 86. Light west southwest wind becoming southwest 5 to 10 mph in the afternoon.

    High: 86 °F

    Slight Chance
    Showers then
    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 58. South southwest wind 5 to 7 mph becoming calm  in the evening.

    Low: 58 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 87. Calm wind becoming southwest 5 to 8 mph in the afternoon.

    High: 87 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 57. Southwest wind 5 to 7 mph becoming calm  in the evening.

    Low: 57 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 57.

    Low: 57 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 54.

    Low: 54 °F

    Mostly Clear

Detailed Forecast

Overnight
A 20 percent chance of showers. Mostly cloudy, with a steady temperature around 68. Light southwest wind.
Friday
A 20 percent chance of showers before 11am. Mostly cloudy, then gradually becoming sunny, with a high near 86. Light west southwest wind becoming southwest 5 to 10 mph in the afternoon.
Friday Night
Mostly clear, with a low around 58. South southwest wind 5 to 7 mph becoming calm in the evening.
Saturday
Sunny, with a high near 87. Calm wind becoming southwest 5 to 8 mph in the afternoon.
Saturday Night
Clear, with a low around 57. Southwest wind 5 to 7 mph becoming calm in the evening.
Sunday
Sunny, with a high near 88.
Sunday Night
Clear, with a low around 57.
Monday
Sunny, with a high near 80.
Monday Night
Mostly clear, with a low around 54.
Tuesday
Mostly sunny, with a high near 79.
Tuesday Night
Mostly clear, with a low around 54.
Wednesday
Sunny, with a high near 83.
Wednesday Night
Mostly clear, with a low around 55.
Thursday
Sunny, with a high near 85.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SE Lake Berryessa CA
 38.53°N 122.2°W (Elev. 440 ft)
2:47 am PDT Aug 28, 2026
5am PDT Aug 28, 2026-6pm PDT Sep 3, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

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